Income Taxes (Schedule Of Statutory Federal Income Tax Rates) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Federal U.S. income tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal tax benefit	3.40%	2.00%	2.00%
Tax-free interest income			(0.30%)
Non-deductible expenses	1.30%	2.70%	4.80%
Non-U.S. income taxed at different rates, net of foreign tax credits	2.20%	3.40%	8.00%
Federal tax credits	(1.20%)	(1.30%)	(2.50%)
Tax impact of uncertain tax positions	(0.40%)	0.20%	(5.10%)
Other, net	(0.20%)	0.60%	2.30%
Effective tax rate	40.10%	42.60%	44.20%